Driving-band and nosing press for projectiles.



Llll..

ffm 1 W. YELLOWLEY.

DRIVING BAND AND NOSING PRESS FOR PROJECTILES.

APPLICATION FILED FEB. a. I9I5.

Witnesses:

Patented Dec. 7, 1915.

Inventor Attorneys William klllowle K WILLJEAM YELLOWLEY, OF KNGSTN,ONTARIO, CANADA.

DRIVING-BAND AND NOSING PRESS FOR PROJECTILES.

incanti..

Y To all whom` t may concern:

1 tains to make and use the same.

The invention to be hereinafter described relates to driving band andnosing presses for` proj ectilesh.

In order to more clearly disclosethe construction, operation, and use ofthe invention, reference should be had to the accompanying drawingsforming part of thepresent application. 4 j l Throughout the severalgures ofthe drawings like reference characters designate the saineparts. l l

ln the drawings: Figure 1 is a top plan View of the press; and Fig. 2 isa central, vertical section through-the same.

The main objects ofthe invention are, t provide a compact, durable, andstrong ma: chine of' simple construction and operation,

at relatively low cost, ywhich, canibe used' equally well for'formingthe-noses of projectilesor .for securing the driving" bands on the same..j v

Referring to the drawings in detail, 1 designates the table which is suported by suitable legs 2 .bolted thereto. his table is provided, on itsupper face, with a number of, in this case six, integral, radial,bifurcated ribs or beams 3 the inner ends of which unite to form anintegral central hub 4. A reinforced casing 5 of approximatelysemielliptical shape is bolted to the hub and provided, in one side,with an opening of suitable size to permit the quick and easyintroduction of a projectile'into the casing.

A suitablenosingdie 6 is removably secured-4 in the topA of caslng 5, inalinelnent with the head of a plunger 7 vertically operative through acentral bore in hub 4.

Plunger 7 is seated upon anextension ram l' 8 integral vwith the top ofa hollow piston 9 operative vin a cylinder 10 bolted to the under faceof table 1. Ram 8 is operative in a socket 11 integral'with the underface of the table and acts to guide the piston in its Vertical travel.The lbottom of'p'iston is Specification of Letters Patent.

Patented Dec. 7, 1915.

Application filed February 8, 1915. Serial No. 6,752.

also provided with an integralcylindrical extension 12 operative in asimilar extension 13 of the cylinder 10. This insures accurate operationof the piston. The extension 12 is provided with four diametricallyopposlte L bores 14; extending from its lower end to a point near thetop of the extension and being open at both ends, for a purpose to belater described.

A pipe 15 communicates with the lower end of the extension 13 ofcylinder 10, at thel center thereof, and is connected to a compressedair tank or other suitable source of supply of fluid pressure. Athree-way cock 16 is interposed in this pipev and operated by a rod 17and crank lever 18 so as to admit the compressed air, or the likeintocyl inder 10, or permit its escape therefrom.

The projectile, the nose of which is to be shaped, is properly heatedandplaced, nose up, on the head of plunger 7, the head of which is suitablyrecessed for this purpose. When the projectile is in position, the lever18 is turned so as to admit the compressed air beneath the extension 12of piston 9. As the air enters the cylinder 10 it acts lirst on therelatively small surface of the extension 12 and raises the piston. Asthe piston is raised the air flows through bores 14 and flows beneaththe piston 9, so as toact on the entire lower face thereof and exertgreat pressure on the plunger A7. The advantage of this is that, thevolume of air required to start the piston is small and the piston israised gradually and easily until the nose of the projectile is in thedie, thus preventing any injurious sudden starts or jars. As piston 9 israised the`plunger`7 is forced upwardly and acts to force the nose ofthe projectile firmly into the die 6, thus shaping it. This operationnecessarily causes a certain Baking of the projectile, as it is shapedand cools, and for this reason aicatch ring 19 is placed in the lowerend of-Casing 5 to-catch these llakings and prevent their falling intothe mechanism of the press.

When thepiston reaches the highest position for the proper forming ofthe nose of the projectile, the upper end of the stem 20 of an escapevalve 21 seated in an opening in the bottom ofthe piston is brought intoengagementV with a set screw 22 threaded through the table 1. Thisforcesvalve 21 0H of its seat so that the air beneath the piston 9enters the same andv escapes through ports 23 through the top thereof.As soon as this permit escape of the air beneath piston 9, the

piston being returned by gravity to its initial position, and theprojectile is removed and cooled. As the operative travel of 'piston 9can be regulated by set screw 22, and as the die 6 and plunger 7 areeasily interchangeable, it will be obvious that this machine can bequickly and easily adapted to shape projectiles of practically any size.

When it is desired to use the machine for securingrthe drivingbands ofprojectiles, the catch ring 19 and the plunger 7 are removed. This isdone by simply lifting the plunger into the casing 5 and removing it,and then removing the catch ring. The projectile, which is provided withthe usual ring groove, with the driving band temporarily secured inposition by suitable means, such as striking lightly with a hammer so asto .j force it slightly into the groove, is then j previously described,

placedin the upper part of the hub 4 of the table 1 the upper end ofwhich is suitably bored for this purpose. In this position the lowerportion of the projectile is between the inner ends of a plurality ofradially disposed blocks 24 slidably mounted in suitable grooves in thehub 4, the inner faces of which. are slightly concaved. The outer endsof these blocks are pivotally connected to the inner endsof toggle arms25 pivotally connected'at their outer ends to the inner ends oftogglearms 26 the outer ends ofV which are pivotally connected to lugsintegral with blocks 27 secured about the inner face of the 'rim oftable 1. This oforms a plurality of simple toggle connections thecenters of which are pivotally connected to the upper ends of arms 28the lower ends of which are pivoted to lugs integral with the upper faceof-piston 9. When the piston is raised, as the i toggles arestraightened out by means of arms 28 and ,force the blocks 24 inwardly.The blocks engage the driving band and force it tightly into itsgroove.As soonl as this has been accomplished, the three-way cock 16 is openedto permit escape of the air from beneath the piston which returns bygravity to itsHoriginal position, after which the projectile is removedand the, driving band is shaped and pressed in the usual manner.

In order to adaptthe machine for projectiles of different diameters itis necessary that the upward movement of the piston be positivelylimited. As the travel of the piston is much less in pressing thedriving bands than-in nosing, it. has beenfound desirable to provideseparate means for effecting this result, though, if desired, .the setscrew 22, valve 21, and their coperating parts, could be, adapted toeifectl this result also. A plurality of radially disposed equallyspaced limiting screws 29 are threaded through table l, directly above.integrall bosses 30 formed on the upper face of piston 9. When thepiston has been raised so that the bosses engaging the limiting screwsits upward-movement is, of course, positively checked, thus avoidingdamage by exerting too great a pressure on the driving band andprojectile. As `soon as the upward movement of the piston is, stopped,the three-way cock 16 is opened and the piston is lowered, as described.By adjusting the limiting screws 29 the travel of the piston may beadjusted and, therefore, the travel of the blocks 24 may be regulated tosuit projectiles of different diameters, as will be obvious.

Acircular plate or cover 31 of suitable construction is secured on topof table 1 to protect the operating mechanism andl to furnish a suitabletop or surface on which the projectiles being operated upon may beplaced so as to be readily accessible.

It is thought that the construction, operation, and use of the inventionwill be clear from the preceding detailed description.

. Changes may be made in the construction,

arrangement, and disposition of the several parts 'of the inventionwithin the scope of the claims without in any way departing from thefield and scope of the same, and it is meant to include all such withinthis application wherein only a preferred form has been disclosed. j

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is;

1. -In a machine' of the character described, a table provided with anintegral central hub,- a casing secured to the said hub, a die removablysecured in the.upper end thereof, a cylinder secured to the under faceof said table, a piston operative therein, a plunger mounted thereon`and operative in said casing, means for admitting iiuid under pressurebeneath said piston and for permitting escape of the said fluid frombeneath the said'piston, means for permitting the escape of the pressurefiui'd from beneath the piston when the piston has reached apredetermined point, radially disposed blocks slidably operative in thehubof the said table, means for forcing the said blocks inwardly asthepiston rises and for withdrawing the said blocks as the piston, falls,and means for positively limiting the upward travel ofsaid piston.

2. In a machine of the character described; a table provided with anintegral central lhub centrally bored to receive a plunger; a

bottom cylindrical extension operative in the cylindrical extension ofthe cylinder,the said extension of the piston being provided withradially disposed l. bores; a removable plunger mounted on the top ofthe said piston and slidably operative through the said hub; a three wayvalve connected to the said eX- tension of the said cylinder; a springpressed valve adapted to normally close an opening through the bottom ofthe said cylinder; means for unseating the said valve when the pistonhas reached a predetermined point; radially disposed blocks slidablyoperative in the hub of the said table; toggle arms connected to saidblocks and to the rim of 15 the table; arms connected to the said togglearms and to the said piston; and means for positively limiting theupward travel of the said piston.

In witness whereof I have hereunto Set 2c my hand in the presence of twowitnesses.

WILLIAM YELLOVVLEY.

IVitnesses:

EDWARD WILLIAM SK'INNER, WM. CASEY.

